tags:

views:

50

answers:

1
Q: 

MySQL using the UUID_SHORT() function...

If I use the UUID_SHORT() function in an INSERT statement, how do I make sure the UUID it creates has not already been used in the table before, does it automatically check that, and regenerate a UUID on collision?

A: 

The value of UUID_SHORT() is guaranteed to be unique if the following conditions hold:

The server_id of the current host is unique among your set of master and slave servers

server_id is between 0 and 255

You don't set back your system time for your server between mysqld restarts

You do not invoke UUID_SHORT() on average more than 16 million times per second between mysqld restarts

Avitus  2010-05-10 01:59:58
Ok so if I am only using it every few days or more it should always remain unique correct?
Murray  2010-05-10 02:02:54

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